Detachable road scraper blade



1933- o. E. PEARCH I DETACHABLE ROA D SCRAPER BLADE Filed Feb. 11. 1932 INVENTOR Patented Nov. 28, 1933 4 I UNITED STATES PATENTOFFICE DETACHABLE ROAD SCRAPER BLADE Oliver Pearch, Detroit, Mich., assignor, by

mesne assignments, to The Penco SteelCor- -'poration, Detroit, Mich., a corporation of Michigan Application February 11, 1932. Serial No. 592,355

5 Claims. (01. 37-143) This invention relates to an improved form of ingly supported, as by bolts B, the plate C, which, road scraper blade, particularly to the means emas brought out in the sectional central part of ployed for effecting the structural union thereof u e 1 is cross Sectionally contoured t t e with the frame of the vehicle, from which such an an es D and E, of which the branch D might 5 article is supported for action upon irregular and roughly e l t0 the thumb of ehes d, 60, unduly high surface portions of a gravel or dirt While h r e h branch E would p ent road, or piles of snow or ice. It'has-for its object the ihdeXj finge vi w d r One s hi the avoidance of the nowefrequently encountered Contouring leaves a v d Spac h y, F, objections in connection with the use of such a which, in h o of Construction S w in Figs 1c blade, vdue t t fact t t incident t t use. ures 1, 2 and 3, extends across the entire width as well as to the fact that the whole vehicle upon of the pp i p ate C. p which it is mounted is oftenleft out ,in the Into this bay er recess F, twee e p ts weather for protracted periods, and such a blade D and E, there is adapted to be i serted the Comwhenattached to the vehicle frame by means of h e lye l d p edge G of the scrape l5 bolts or similar instrumentalities often becomes blade p p r K s insertion ef'the blade 70 rusted or frozen, to such a degree that, when Within-the lfeeessed lower edge of the supporting it is desired to remove a worn down or bent blade, Plate C is laeeemplished y fi moving he blade it is often difiicult to the degree of impossibility H toward h O end of the pl CV to, do sowithout breakage of the parts, because i a position o or less transverse of the plane of the rusted'adhesion above referred to. In the thereof, ahdeftel'the Point G has p r y entered 76 construction forming the subject matter of my the space F, tracking the e lower edge o fr t e invention, these features of objection are avoided, c aper blade H thereebeut as a Ce er or Sort while leaving both the serviceability of the blade, of knuckle, so t y e time the blade H has when installed on the vehicle, and its easy rereached the position shown ih'Figllle l s moval when desired, unimp ired, V tially coincident with the'extended planeof the so In t drawing; supporting plate C,.the point E of the latter has Figure 1 is an end or edge elevational view, engaged in the slight inbent Contouring o t e partlyin section, of one of my improved scraper corresponding p O t e ear surface of the blades, shown in position on a fragmentary porblade H. A firm structural interlock of these ti of a hi l frame parts has now .been effected, and, since the main Figure2 is (an elevational view taken from the P t ef'the knuclrIle entering e G O rear of th hi namely, t right, angles t the scraper blade H is well within the recess F, the position shown in Figure 1, though of aba minimum 0 moisture, if indeed y, e911 enter breviated length from top to bottom. in a manner to Cause y freezing o t e ur- 35 Figure 3-1 fragmentary perspective of the face parts of these interlocking portions. When 9 meeting and interlocking edges of the s ra er the blade H has attained the position described blade and of the adjacent supporting part of the and shown, its l'lhlhtentioheil displacement y frame, shown in disassembled relation to one be P d egall'lst y passlhg One 01 more Of n th the pins J each through a suitable bore or recess 40 Figure 4 is a partly sectional end view similar in the supporting p e such stem pin J ,95 to Figure 1, though illustrating a slightly modified also traversing correspondingly d ed 0 form. being taken along the line 4-4 of Figure 5 ooved'portion of theeconvex surface of the inand looking in the direction of the arrows there terlockihg top edge These p l J serve no sho n, function as regards aiding the resistance of the Figure 5 is a View from the rear of the vehicle bled-e H to displacement pressure y such Toad 1 00 illustrating this modified form, similarly to the slil'faee irregularities a ihdieeted at K in manner in which Figure 2 illustrates the form first Flglll'e but merely serve as an easily o ab e 1 looking or clinching element after the blade has Figure 6, similarly to Figure 3, is a perspective been swung into position in the manner described, 5!} of the detached but juxtapositioned parts of this preve ting itsbe ng wu g in the pposite direcmodified form of blade and its supporting vehicle t on' and thus loosened. frame element, showing the interlocking means In he modi d mS OW in Figures 5, a d therein employed. 6, the, same principles of construction are fol At A in Figure 1 is shown fragmentarily a porlowed as regards the interlocking of the scraper s5 tion of a vehicle frame, from which 'is dependblade N and the supporting plate L, but in place l of the complementary grooving of the lower edge of the supporting plate L and of the top edge of the scraper blade N extending completely from side to side of the vehicle frame, and fully lengthwise of each, I merely provide two or more complementary locking surfaces, as M and P and M and P, at suitably spaced positions along the meeting edges of these two plates. And since the several pairs of interlocking knuckled surfaces M and P must be in axial alignment when finally positioned, it will be obvious that the driving of a locking pin, as Q, through the meeting portion of either pair, similarly to the construction of the pin J shown in Figures 1 to '3 inclusive, would be amply adequate to prevent undesired displacement of the scraper blade from its effected support by the lower edge of thesupporting plate. As in the form first described, the greater and more prolonged the pressure against the fOY': wardly facing surface of the scraper blade N the more firmly will it tend to interlock along its top edge with the prepared lower edge portions of the supporting plate L. The contrast between the approximate meeting of the adjacent edges of the plates L and M along most of their length, particularly along the line 4-4 of Figure 5 of which sectionally elevational Figure 6 is taken, and the interlocking of two of the complementary surfaces, as M and P, is brought out in this latter figure by the dotted-in representation of these parts.

' What I claim is:

1. Means for detachably supporting a road scraper blade, comprising a supporting plate and a scraper blade having portions angularly disposed relatively to each other, said plate and blade being provided along their meeting edges with complementarily interfitting edge portions curved about an axis extending longitudinally of the blade and on a radius shorter than the width of the blade, whereby the blade is adapted to .be structurally integrated with the plate by swinging movement of the scraper blade rela tively to the plane of the supporting plate when their adjacent edges have been brought into juxtaposition, said edges being complementarily contoured as entering and receiving elements, and a removable locking pin adapted to operatively engage said contoured edges of the plate and blade when thus interlocked, thereby preventing their unintended disengagement.

3. In combination with a supporting plate normally forming a permanent part of a vehicle frame, the lower edge of said plate being formed at selected points into a cross-sectionally concaved shape resembling a socket, a scraper blade adapted for detachable association therewith, being correspondigly contoured along its top edge for interlocking engagement with the described lower edge portions of said supporting plate, and locking pins removably engageable with the described interlocking portions of said parts, whereby the displacement of said scraper blade from its engagement with said supporting plate is prevented.

4. In combination, a scraper blade having a selectively contoured top edge portion, a supporting element therefor adapted to be positioned on a vehicle frame, said supporting element having its lower edge formed complementarily to the contourings of the top edge of said scraper'blade ior interfitting assembly therewith, said interfitting parts being curved about a radius shorter than the width of the blade, and one having an abutment limiting swinging movement of the other relatively thereto when they areassembled, whereby they may be interlocked by inserting one part in the other and rocking the blade. H i l 5. In combination with a scraper blade sup porting element, a scraper blade for detachable aflixing thereto, said support and blade being provided with complementarily interfitting contourings on their, meeting edges curved about a radius shorter than the width of the blade, whereby the blade is adapted to be moved to and from positions of engagement with and disen gagement from the support by angularly swinging movement of the scraper blade relatively to its support with the described interfitting contourings of each operatively interfitting.

OLIVER E. PEAR-CH.

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